About this item Diamond Grinding Wheel Disc: Dia x Arbor Hole: 6" x 1/2"; The 4 grinder disc are each four different levels of roughness, grit: 80 400 800 1200. Superior Performance: This diamond polishing disc set is made of high grade metal with diamonds on one side, nearly 95%. The plated diamond particles are uniform & clear grain, high grinding precision, good flatness, long service life. Widely Used: This diamond grinding disc is designed for polishing & sanding extremely hard materials, such as: granite marble gemstones, rocks, glass, etc; Especially suitable for jewellery lapidary making. Convenience and Multipurpose: Extremely flat and parallel design allows for a completely seamless fit of the discs, with embedded abrasives for fast cutting while achieving the most accurate cuts possible; For dry/wet grinding, to meet your different needs. Why Choose Us: One set of discs for every work situation; Package contains 4 diamond grinding wheels with different levels of roughness. Grit Very Coarse (80) Medium Fine (400; 800) Very Fine (1200). We hope to bring you good products & services; Please feel free to contact us if you have any questions. › See more product details